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Several people were hit when a 2006 Jeep Grand Cherokee apparently lurched out of control and crashed through a wall.

The 76-year-old man who drove the SUV did not have an active driver’s license. It was suspended in 2012 after several incidents that occurred the year before, including impeding operation, no valid inspection sticker and a license plate violation.

It is still unclear what led to the acceleration, but investigators determined that it was not intentional.

"This remains an active an ongoing investigation being conducted by the Middlesex District Attorney's Office, the Billerica Police Department and the Massachusetts State Police CARS unit," the DA's office said.